The frequency and the scale of disasters are both increased due to the global climate change in recent years. Preservation strategies to cultural heritage shall take both the entire environment and the large-scale disasters into consideration. Unfortunately, the thought on disaster preparedness to cultural heritage in Taiwan still concentrates on fire, decay, structural reinforcement for single building and ignores concepts of the environment as a whole. These traditional preservation practices are unable to resist the frequent natural hazards in scale and tends caused by climate change. This study adopts the perspective of risk identification and uses the geographic information systems to construct flood risk thematic maps on cultural heritage. Study result finds the positive correlation between the disaster risk of cultural heritage and the rainfall intensity. Historical buildings are the most affected cultural heritage by flood, which is followed by municipality /county monuments, national monuments, and historical site. None of the traditional settlements and cultural landscapes is affected. It might be related to the taboo space (shelter) in the traditional culture regarding site selection. Affected cultural heritage mainly concentrates in central and northern Taiwan, while the heritage in northern and eastern Taiwan suffers from more serious flooding depth.